Exfo FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 Manual de usuario descargar pdf (Pagina 118)

Setting Up the Instrument in Drift Mode

112 FTB-5230S/-OCA

Setting Up Drift Analysis Parameters

 Channel width (GHz or nm): indicates the limit inside which the

power values will be considered in the channel.

For default channels, the channel width that sets the limits of the

channel, should be the same as the channel distance or smaller

(channel distance is defined while creating a channel list). If the

channel width is not compatible with the channel spacing, either a

single peak may be found for two distinct channels and two

analysis would be performed and displayed for that peak, or, it is

possible that two peaks may be found within the same channel

and be considered as one multi-peak signal. With this result, you

can use markers to find the spacing between adjacent channels or

to find the channel width.

 Snap to ITU Grid: When selected, each detected peak will be

defined by the nearest ITU channel. The ITU grid is based on the

selected channel width.

 Signal power calculation: indicates which calculation method to

apply for signal power value.

Integrated signal power: The integrated signal power represents

the sum of the power values included between the channel limits

of this channel, minus the estimated noise contribution between

the same boundaries. In some cases, for instance CATV signals,

signals with high-frequency modulation, or signals with an

inherent line width similar or larger than the OSA/OCA's resolution

bandwidth, this calculation becomes a better estimation of the

true signal power.

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Exfo FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 Manual de usuario Pagina 118